Does this symbol belong to? I thought it was a LAPP apparently it is not.View attachment 224498View attachment 224499
Lapp Insulator Co. in LeRoy, New York. It's an intertwined L and I (for Lapp Insulator) inside an oval. They're still in business today.
The gap in the oval and L in your first photo are a date code, indicating your insulator was produced in the 3rd quarter of 1924.